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Finding the Fourth Proportional to 874.11, 1,312.97 and 844.95

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Solution

The fourth proportional to 874.11, 1,312.97 and 844.95 is: 1,269.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    874.11 : 1,312.97 = 844.95 : x
  2. Step 2: Convert to fraction form
    874.11/1,312.97 = 844.95/x
  3. Step 3: Cross multiply
    874.11x = 1,312.97 × 844.95
  4. Step 4: Simplify right side
    874.11x = 1,109,389.78
  5. Step 5: Solve for x
    x = 1,109,389.78/874.11
  6. Step 6: Final answer
    x = 1,269.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.